One section asked subjects to choose from a list of “dislikes”: “1. The batteries died on her tape recorder, so they made a date to finish the interview later that week, which turned into dinner for two.

The demolition of the Third Avenue Elevated subway line set off a building boom and a white-collar influx, most notably of young educated women who suddenly found themselves free of family, opprobrium, and, thanks to birth control, the problem of sexual consequence.

They then "date" samples from these rocks to test their relative age hypotheses.

Sample dating is done by counting beads that represent 235U and 207Pb atoms in a zircon.

Some sites (Stonehenge, New Grange) show a definite interest in simple solar observations.